Do you know how to make laser pointer?

For some electronic products such as mobile phones, the appearance requirements are high, and defects such as stains and scratches will occur in the production. In the prior art, a spot gauge (stain card) is manually used under lighting conditions to measure and compare the area, diameter, width, length, etc. of stains, scratches, etc., of mobile phone casings, lenses, displays, etc., and whether they exceed the prescribed standards. . The point gauge (stain card) is a plastic transparent rectangular sheet, and the surface is provided with dimensional standards for points, lines, and surfaces. When comparing, place a point gauge on the stains and scratches on the surface of the product for direct measurement, and compare and determine the benignity of the product through different size benchmarks. A laser pointer includes a pen body, a pen tip fixedly connected to one end of the pen body, a laser generator housed in the pen tip, a power switch for controlling the laser generator, and a measuring device. The measuring device includes a tick The dial and a measuring disk; the dial can be relatively rotatably connected to the pen body and accommodated in the pen tip; the peripheral wall of the dial is provided with a scale area corresponding to the size of the product defect, and the peripheral wall of the dial Exposure to the tip of the pen; the measuring disc is provided with a plurality of circular holes corresponding to the scale area of ​​the scale to transmit the laser beam generated by the laser generator; the measuring disc is fixedly connected to the scale, and the scale is rotated through The size of the circular hole of the measuring disk located on the optical path of the laser generator can be adjusted to control the size of the light spot generated by the Laser pointer.